This Parks Capella vest has a cylindrical curvature that form-fits to your body's contours and provides extra rib protection. Its round fit is sewn from five panels of two-way stretch neoprene and perforated Ariaprene for an extremely lightweight, breathable vest design. Designed to be flexible and buoyant, it includes oversized armholes for increased mobility. Smooth skin with neoprene shell. Two buckles and 1 zip closure. USCG approved. Sizes: S(31"-34"), M(34"-37"), L(37"-40"), XL(40"-43"), 2XL(43"-46").